
Large-scale clinical characterization
• Demographics: age, gender, race, ethnicity, index year
and month
• Conditions
– SNOMED verbatim concepts and all ancestral groupings
– 365 days, 30d, 180d inpatient, all-time prior, overlapping
• Drugs
– RxNorm verbatim concepts and all ancestral groupings of
RxNorm ingredients and ATC classes
– 365 days, 30d, all-time prior, overlapping
• Procedures, Measurements, Observations
• Concept density: # of visits, distinct drugs, conditions
• Risk scores, such as Charlson index
The same types of covariates you’d be using for your
Table 1 of your paper and for fitting propensity score and
outcome model…only bigger…